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thermal: add trace events to the power allocator governor 

Add trace events for the power allocator governor and the power actor
interface of the cpu cooling device.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Javi Merino 2015-03-02 17:17:20 +00:00 committed by Eduardo Valentin
parent 6b775e870c
commit 6828a4711f
4 changed files with 194 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/thermal/cpu_cooling.c
View File

@ -31,6 +31,8 @@
#include <linux/cpu.h>
#include <linux/cpu_cooling.h>
#include <trace/events/thermal.h>
/*
* Cooling state <-> CPUFreq frequency
*
@ -588,12 +590,20 @@ static int cpufreq_get_requested_power(struct thermal_cooling_device *cdev,
u32 *power)
{
unsigned long freq;
int cpu, ret;
int i = 0, cpu, ret;
u32 static_power, dynamic_power, total_load = 0;
struct cpufreq_cooling_device *cpufreq_device = cdev->devdata;
u32 *load_cpu = NULL;
freq = cpufreq_quick_get(cpumask_any(&cpufreq_device->allowed_cpus));
if (trace_thermal_power_cpu_get_power_enabled()) {
u32 ncpus = cpumask_weight(&cpufreq_device->allowed_cpus);
load_cpu = devm_kcalloc(&cdev->device, ncpus, sizeof(*load_cpu),
GFP_KERNEL);
}
for_each_cpu(cpu, &cpufreq_device->allowed_cpus) {
u32 load;
@ -603,14 +613,29 @@ static int cpufreq_get_requested_power(struct thermal_cooling_device *cdev,
load = 0;
total_load += load;
if (trace_thermal_power_cpu_limit_enabled() && load_cpu)
load_cpu[i] = load;
i++;
}
cpufreq_device->last_load = total_load;
dynamic_power = get_dynamic_power(cpufreq_device, freq);
ret = get_static_power(cpufreq_device, tz, freq, &static_power);
if (ret)
if (ret) {
if (load_cpu)
devm_kfree(&cdev->device, load_cpu);
return ret;
}
if (load_cpu) {
trace_thermal_power_cpu_get_power(
&cpufreq_device->allowed_cpus,
freq, load_cpu, i, dynamic_power, static_power);
devm_kfree(&cdev->device, load_cpu);
}
*power = static_power + dynamic_power;
return 0;
@ -718,6 +743,8 @@ static int cpufreq_power2state(struct thermal_cooling_device *cdev,
return -EINVAL;
}
trace_thermal_power_cpu_limit(&cpufreq_device->allowed_cpus,
target_freq, *state, power);
return 0;
}

22
drivers/thermal/power_allocator.c
View File

@ -19,6 +19,9 @@
#include <linux/slab.h>
#include <linux/thermal.h>
#define CREATE_TRACE_POINTS
#include <trace/events/thermal_power_allocator.h>
#include "thermal_core.h"
#define FRAC_BITS 10
@ -138,7 +141,14 @@ static u32 pid_controller(struct thermal_zone_device *tz,
/* feed-forward the known sustainable dissipatable power */
power_range = tz->tzp->sustainable_power + frac_to_int(power_range);
return clamp(power_range, (s64)0, (s64)max_allocatable_power);
power_range = clamp(power_range, (s64)0, (s64)max_allocatable_power);
trace_thermal_power_allocator_pid(tz, frac_to_int(err),
frac_to_int(params->err_integral),
frac_to_int(p), frac_to_int(i),
frac_to_int(d), power_range);
return power_range;
}
/**
@ -219,7 +229,7 @@ static int allocate_power(struct thermal_zone_device *tz,
struct power_allocator_params *params = tz->governor_data;
u32 *req_power, *max_power, *granted_power, *extra_actor_power;
u32 total_req_power, max_allocatable_power;
u32 power_range;
u32 total_granted_power, power_range;
int i, num_actors, total_weight, ret = 0;
int trip_max_desired_temperature = params->trip_max_desired_temperature;
@ -295,6 +305,7 @@ static int allocate_power(struct thermal_zone_device *tz,
divvy_up_power(req_power, max_power, num_actors, total_req_power,
power_range, granted_power, extra_actor_power);
total_granted_power = 0;
i = 0;
list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
if (instance->trip != trip_max_desired_temperature)
@ -305,10 +316,17 @@ static int allocate_power(struct thermal_zone_device *tz,
power_actor_set_power(instance->cdev, instance,
granted_power[i]);
total_granted_power += granted_power[i];
i++;
}
trace_thermal_power_allocator(tz, req_power, total_req_power,
granted_power, total_granted_power,
num_actors, power_range,
max_allocatable_power, current_temp,
(s32)control_temp - (s32)current_temp);
devm_kfree(&tz->device, req_power);
unlock:
mutex_unlock(&tz->lock);

58
include/trace/events/thermal.h
View File

@ -77,6 +77,64 @@ TRACE_EVENT(thermal_zone_trip,
__entry->trip_type)
);
TRACE_EVENT(thermal_power_cpu_get_power,
TP_PROTO(const struct cpumask *cpus, unsigned long freq, u32 *load,
size_t load_len, u32 dynamic_power, u32 static_power),
TP_ARGS(cpus, freq, load, load_len, dynamic_power, static_power),
TP_STRUCT__entry(
__bitmask(cpumask, num_possible_cpus())
__field(unsigned long, freq )
__dynamic_array(u32, load, load_len)
__field(size_t, load_len )
__field(u32, dynamic_power )
__field(u32, static_power )
),
TP_fast_assign(
__assign_bitmask(cpumask, cpumask_bits(cpus),
num_possible_cpus());
__entry->freq = freq;
memcpy(__get_dynamic_array(load), load,
load_len * sizeof(*load));
__entry->load_len = load_len;
__entry->dynamic_power = dynamic_power;
__entry->static_power = static_power;
),
TP_printk("cpus=%s freq=%lu load={%s} dynamic_power=%d static_power=%d",
__get_bitmask(cpumask), __entry->freq,
__print_array(__get_dynamic_array(load), __entry->load_len, 4),
__entry->dynamic_power, __entry->static_power)
);
TRACE_EVENT(thermal_power_cpu_limit,
TP_PROTO(const struct cpumask *cpus, unsigned int freq,
unsigned long cdev_state, u32 power),
TP_ARGS(cpus, freq, cdev_state, power),
TP_STRUCT__entry(
__bitmask(cpumask, num_possible_cpus())
__field(unsigned int, freq )
__field(unsigned long, cdev_state)
__field(u32, power )
),
TP_fast_assign(
__assign_bitmask(cpumask, cpumask_bits(cpus),
num_possible_cpus());
__entry->freq = freq;
__entry->cdev_state = cdev_state;
__entry->power = power;
),
TP_printk("cpus=%s freq=%u cdev_state=%lu power=%u",
__get_bitmask(cpumask), __entry->freq, __entry->cdev_state,
__entry->power)
);
#endif /* _TRACE_THERMAL_H */
/* This part must be outside protection */

87
include/trace/events/thermal_power_allocator.h Normal file
View File

@ -0,0 +1,87 @@
#undef TRACE_SYSTEM
#define TRACE_SYSTEM thermal_power_allocator
#if !defined(_TRACE_THERMAL_POWER_ALLOCATOR_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_THERMAL_POWER_ALLOCATOR_H
#include <linux/tracepoint.h>
TRACE_EVENT(thermal_power_allocator,
TP_PROTO(struct thermal_zone_device *tz, u32 *req_power,
u32 total_req_power, u32 *granted_power,
u32 total_granted_power, size_t num_actors,
u32 power_range, u32 max_allocatable_power,
unsigned long current_temp, s32 delta_temp),
TP_ARGS(tz, req_power, total_req_power, granted_power,
total_granted_power, num_actors, power_range,
max_allocatable_power, current_temp, delta_temp),
TP_STRUCT__entry(
__field(int, tz_id )
__dynamic_array(u32, req_power, num_actors )
__field(u32, total_req_power )
__dynamic_array(u32, granted_power, num_actors)
__field(u32, total_granted_power )
__field(size_t, num_actors )
__field(u32, power_range )
__field(u32, max_allocatable_power )
__field(unsigned long, current_temp )
__field(s32, delta_temp )
),
TP_fast_assign(
__entry->tz_id = tz->id;
memcpy(__get_dynamic_array(req_power), req_power,
num_actors * sizeof(*req_power));
__entry->total_req_power = total_req_power;
memcpy(__get_dynamic_array(granted_power), granted_power,
num_actors * sizeof(*granted_power));
__entry->total_granted_power = total_granted_power;
__entry->num_actors = num_actors;
__entry->power_range = power_range;
__entry->max_allocatable_power = max_allocatable_power;
__entry->current_temp = current_temp;
__entry->delta_temp = delta_temp;
),
TP_printk("thermal_zone_id=%d req_power={%s} total_req_power=%u granted_power={%s} total_granted_power=%u power_range=%u max_allocatable_power=%u current_temperature=%lu delta_temperature=%d",
__entry->tz_id,
__print_array(__get_dynamic_array(req_power),
__entry->num_actors, 4),
__entry->total_req_power,
__print_array(__get_dynamic_array(granted_power),
__entry->num_actors, 4),
__entry->total_granted_power, __entry->power_range,
__entry->max_allocatable_power, __entry->current_temp,
__entry->delta_temp)
);
TRACE_EVENT(thermal_power_allocator_pid,
TP_PROTO(struct thermal_zone_device *tz, s32 err, s32 err_integral,
s64 p, s64 i, s64 d, s32 output),
TP_ARGS(tz, err, err_integral, p, i, d, output),
TP_STRUCT__entry(
__field(int, tz_id )
__field(s32, err )
__field(s32, err_integral)
__field(s64, p )
__field(s64, i )
__field(s64, d )
__field(s32, output )
),
TP_fast_assign(
__entry->tz_id = tz->id;
__entry->err = err;
__entry->err_integral = err_integral;
__entry->p = p;
__entry->i = i;
__entry->d = d;
__entry->output = output;
),
TP_printk("thermal_zone_id=%d err=%d err_integral=%d p=%lld i=%lld d=%lld output=%d",
__entry->tz_id, __entry->err, __entry->err_integral,
__entry->p, __entry->i, __entry->d, __entry->output)
);
#endif /* _TRACE_THERMAL_POWER_ALLOCATOR_H */
/* This part must be outside protection */
#include <trace/define_trace.h>